Table 1

Demographic data, lung function parameters and daytime blood gases

CharacteristicsSRI app (N=30)SRI paper (N=30)
Age (years)66.9 (±10.3)69.4 (±9.4)
Female sex(%)4040
FEV1 after bronchodilation (%pred)37.4 (±19.8)37.2 (±14.3)
FVC (%pred)54.5 (±23.5)58.1 (±19.4)
FEV1/FVC ratio (%pred)52.6 (±19.6)49.5 (±16.2)
TLC (%pred)99.9 (±23.1)102.6 (±31.5)
RV (%pred)161.1 (±60.8)179.3 (±78.2)
BMI (kg/m2)27 (±8.3)28.3 (±7.9)
pH7.43 (±0.04)7.42 (±0.04)
PaO2 (mm Hg)68.6 (±16)61 (±10.7)
PaCO2 (mm Hg)45 (±7.1)47.7 (±6.1)
HCO3 (mmol/L)28.7 (3.4)28.9 (±3.2)
LTOT (in %)66.770.0
NIV (in %)56.763.3
  • ARDS, Acute respiratory distress syndrome; BMI, body mass index; COPD, Chronic obstructive Pulmonary disease; FEV1, forced expiratory volume in one second; FVC, forced vital capacity; HCO3, arterial standard hydrogen carbonate; LTOT, long-term oxygen therapy; NIV, non-invasive ventilation; PaCO2, arterial partial pressure of carbon dioxide; PaO2, arterial partial pressure of oxygen; RV, residual volume; SRI, Severe Respiratory Insufficiency Questionnaire; TLC, total lung capacity.